Eccentric.



R. M." CLARK.

EGGBNTRIO.

APPLICATION FILED NOV-18, 1908.

- Patented May 4, 1909.

WITNESSES ATTORNEYS its bearin s or 'ournals.

REUBEN MARSHALL CLARK, OF WEBB CITY, MISSOURI.

ECCENTRIC.

Specification of Letters Patent.

Patented May 4, 1909.

Application filed November 18, 1908. Serial No. 463,201.

To all whom it may concern:

Be it known that I, REUBEN MARsHALL CLARK, a citizen of the UnitedStates, and a resident of Webb City, in the county of Jasper and Stateof Missouri, have invented a new and Improved Eccentric, of which thefollowing is a full, clear, and exact description.

This invention relates to certain improvements in eccentrics, and moreparticularly to that type of eccentric illustrated in my previous patentNo. 855282, granted May 23, 1907.

The object of the invention is to provide an improved construction ofeccentric disk, whereby the latter may be more readily removed from ashaft or secured thereto, and whereby the strain on the bolts holdingthe parts of the disk together is reduced to a minimum.

A further object of the invention is to reduce the strain on the boltssecuring the eccentric to the collar, by providing the collar and diskwith groove and flange connections which resist any turning movement ofthe eccentric Reference is to'be had to the accompanying drawingsforming a part of this specification, in which similar characters ofreference indicate corresponding parts in all the figures.

Figure 1 is a side view of the device constructed according to myinvention Fig. 2 is an edge view, the eccentric strap being removed Fig.3 is a view similar to Fig. 2, but taken at right angles theretopFig. 1is an end view of the collar; Fig. 5 is an end view of the eccentricdisk and Figs. 6 and 7 are views of the two parts or sections of theeccentric.

In the type of eccentric illustrated in the accompanying drawings, Iprovide an eccentric disk 10, formed of separable sections so that itmaybe brought into position around a shaft 11 without removing the latterfrom The eccentric disk is not secured directly to the shaft but is adjustably secured to a collar 12, which latter is rigidly secured to theshaft. The construction, size, or position of the shaft forms no portionof my invention, nor does the specific character of the collar, save inregard to the structure of the face thereof. I have illustrated a collarformed of two separate sections 18, 18,bolted together to clamp thecollar to the shaft, but it is evident that the collar could be formedof a single piece of metal slipped onto the end of the shaft. The collaris provided with an annular flange 14 to which the eccentric disk issecured, and in the face of this flange, and extending across thediameter of the collar, is a groove 15 of a width slightly greater thanthe diameter of the shaft. The collar carries two bolts 16, 16 parallelto the shaft and disk, at diametrically opposite points, and uponopposite sides of the groove 15. These bolts serve for securing theeccentric disk in position, as will be hereinafter more fully pointedout.

My improved eccentric disk is formed of two separate sections 17 and 18which together inclose the shaft, and which may be rigidly securedtogether and to the collar. The disk is provided with an elongatedopening 19 extending therethrough, one end portion of the opening beingconcentric with the disk and disposed at the center thereof, and theopposite end portion of the opening being at one side of the center. Theopening is of a Width substantially equal to the diameter of the shaft,and the ends of the opening have such a curvature that when the shaft isat one end of the opening the disk will be concentric, but when theshaft is at the opposite end of the opening the disk and shaft will beeccentric. The disk is provided with a flange 20 on one face thereof,and extending across a diameter in the same general direction as theopening 19. This flange is of a width and depth substantially equal tothe width and depth of the groove 15, so that when the disk and collarare brought together they may have a relative movement by the sliding ofthe flange lengthwise of the groove, and this movement will bring abouta corresponding relative movement of the shaft and elongated opening 19.The eccentric is provided with two additional elongated openings 21, 21disposed upon opposite sides of the central opening 19, and each of awidth substantially equal to the diameter 0f the bolts 16. Theseopenings are so disposed that when the disk is concentric with the shaftthe bolts 16 will extend through the openings 21 at one end thereof, andthe tightening of nuts on these bolts will rigidly secure the disk tothe collar. By loosening the nuts the collar may be moved in respect tothe shaft, and the bolts will move along the elongated openings 21. Thusthe eccentric may be rigidly secured to the collar and have any desiredeccentricity in respect to the shaft. The main section 17 of the disk iscut away in the face thereof opposite to the disk and at one side of thecenter, and is also cut away from the opening 19 to the periphery of thedisk in the direction of the length of said opening. The section 18 ofthe disk is provided with a central body portion 22 which fits into thesection 17 to form an end to the opening 19, and this body portion hasoutwardly extending side flanges 23 which engage with the face of thedisk in the cut away portions. The two sections of the disk are securedtogether by bolts 24 disposed parallel to the bolts 16, and extendingthrough the side flanges 23 of the section 18 and into the body portionof the section 17. By means of this construction the strain tending toseparate the two sections is entirely a shearing strain which isresisted by the bolts 24, and furthermore, by the eccentric strap 25which encircles the disk. The tendency to rotate in respect to thecollar is resisted by the flange 20 and groove 15, so that this strainis removed from the bolts 16 and their sole function is to hold thecollar and disk against radial or axial movement. As the bolts 16 arecarried by the collar, the disk may be radially moved while leaying thebolts in position ready for a new dis Having thus described myinvention, 1 claim as new and desire to secure by Letters Patent:

1. In combination, a shaft, a collar secured thereto, an eccentric diskformed of two sections, one of said sections having an elongated openingtherein and having a portion of one face thereof cut away, and the otherof said sections having a body portion extending into one end of saidopening and closing the same and having outwardlyextending flanges inengagement with said cutaway portion, means for locking said sectionstogether, comprising oppositely-disposed bolts extending through saidflanges and substantially parallel to the axis of the eccentric, andmeans for locking said eccentric to said collar and permitting of themovement of the eccentric in respect to the shaft to vary theeccentricity of the former.

2. An eccentric formed of two sections, one of said sections having anelongated opening therein and having a portion of one face thereofadjacent one end of the opening cut away to form recesses, and the otherof said sections having a body portion extend ing into one end of saidopening and closing the same and having outwardly-extending flangesentering said recesses, and oppositelydisposed bolts extending throughsaid flanges substantially parallel to the axis of the eccentric forsecuring said sections together.

3. An eccentric formed of two sections,

one of said sections having an elongated opening therein and having aportion of one face thereof adjacent one end of the opening cut away toform recesses, and the other of said sections having a body portionextending into one end of said opening and closing the same and havingoutwardly-extending flanges entering said recesses, oppositelydisposedbolts extending through said flanges substantially parallel to the axisof the eccentric for securing said sections together, thefirst-mentioned section having elongated openings upon opposite sides ofthe firstmentioned elongated openings, and bolts extending throughlast-mentioned openings for securing said eccentric in position andpermitting of the varying of its position.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

REUBEN MARSHALL CLARK.

W'itnesses J. CARROLL BARR, A. D. HATTEN.

